there is a reason why they make replacement springs.

http://www.cascadecyclery.com/cart/t...g-p-26306.html


the spring pins are threaded internally, so you can thread a bolt and washer in there and pull the pin out.

exploded view.

http://www.timesport.fr/product-shee...0.idp.113.html

rebuild

http://www.sicklines.com/tech/howto/...dal-rebuilding